# Astrodate vs Julian Clock

The clearest difference is rating: Julian Clock at 4.9 against Astrodate's 1.0. Julian Clock also leads on ratings volume (15 vs 1) and chart position (#173 vs unranked). Astrodate's advantage is update cadence (every 12 months vs every 69 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Astrodate costs $0.99 and Julian Clock $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Julian Clock holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Julian Clock has 15 ratings behind it against 1, so its average is the more settled of the two.

Astrodate ships an update every 12 months, Julian Clock every 69 months. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Astrodate | Julian Clock |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/astrodate/id308461774/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/julian-clock/id959214765/reviews)** |
| Number of ratings | 1 | **15** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 69 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#173** |
| Size | 1 MB | 4 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Flying Titans, Inc.](https://appshunter.io/developer/308461777) | [Adam Allard](https://appshunter.io/developer/959214764) |

## What reviewers say

### Astrodate

[App page](https://appshunter.io/ios/app/astrodate/id308461774)

This app provides the current date and time in multiple specialized formats, including Julian Date, Modified Julian Date, and Truncated Julian Date. It also offers standard Gregorian ISO 8601 formats, eliminating the need for manual calculations. Ideal for astronomers and those requiring precise timekeeping across various systems.

**Highlights:** Julian Date conversion, Modified Julian Date, Truncated Julian Date, Dublin Julian Date, Gregorian ISO 8601 format, Astronomical date calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### Julian Clock

[App page](https://appshunter.io/ios/app/julian-clock/id959214765)

**Currently charting:** #173 Top Paid · Utilities (US App Store)

This utility app displays the current Julian Date, time with seconds, military date format, day of the week, and Zulu time (GMT). It's designed for quick access to essential timekeeping information.

**Highlights:** Julian Date display, Real-time clock with seconds, Military date format, Day of the week, ZULU time (GMT)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Astrodate free?

Astrodate costs $0.99, with no in-app purchases.

### Is Julian Clock free?

Julian Clock costs $0.99, with no in-app purchases.

### Which has better reviews, Astrodate or Julian Clock?

Julian Clock is rated higher. Astrodate averages 1.0 out of 5 from 1 ratings, while Julian Clock averages 4.9 from 15 ratings.

### Do Astrodate or Julian Clock have ads?

Neither Astrodate nor Julian Clock shows ads.

### Which is updated more often, Astrodate or Julian Clock?

Astrodate ships an update every 12 months, and Julian Clock every 69 months. Most recently, Astrodate was updated on September 10, 2026 and Julian Clock on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*